# Live HTTP 405 Method-Cluster Endpoint Scorecard for Agent Payment Endpoints

> Live HTTP 405 Method-Cluster Endpoint Scorecard for Agent Payment Endpoints is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-10-13).

Scores a fixed set of x402 merchant URLs that advertise paid endpoints but respond with HTTP 405, classifying each by whether it 405s on GET-only or all methods and issuing a blunt verdict.

## Facts

- Endpoint: GET https://k2so.wrong.systems/api/services/live-http-405-method-cluster-endpoint-scorecard?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: down
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/live-http-405-method-cluster-endpoint-scorecard-for-agent-payment-71a1612d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KF5VzWDaIXt_4X9OrQgjb

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability live-http-405-method-cluster-endpoint-scorecard-for-agent-payment-71a1612d
```

Example prompt: Can you run the 405 method-cluster scorecard against those x402 merchant endpoints using a GET request and give me the blunt verdict on which ones are actually issuing 402 payment challenges versus just returning 405 errors?

## When to prefer this

Choose this endpoint when you need a pre-integration health check on a specific set of known x402 merchant URLs that are suspected to be misconfigured — specifically when they advertise payment gating but return HTTP 405 instead of a 402 challenge. It provides a structured, blunt verdict rather than generic API monitoring, making it valuable for agent payment pipeline validation and x402 ecosystem due diligence.

## Known failure modes

- Missing or invalid 'method' field returns a schema validation error
- Requesting a method not in the allowed enum (GET/HEAD/DELETE) is rejected
- Payment not fulfilled results in no paid response body being returned
- Endpoint may return stale or cached assessments if underlying merchant URLs change
- LLM-generated briefs may vary in specificity depending on model availability

## How this service works

Paid agent-facing brief on live HTTP 405 method-cluster endpoint scorecard for agent payment endpoints: score a named set of x402 merchant URLs (tools.halowerk.com/v1/agent/access, stableupload.dev/api/upload, apiacre.com/v1/data/convert, stableenrich.dev/api/exa/search, hypercli solo) that advertise paid endpoints but answer HTTP 405 with no 402 challenge. Verdict ladder per endpoint: 405-on-GET-only vs 405-on-all-methods, -0. Blunt decision procedure, not marketing.

## Output

Returns a JSON object with ok/paid flags, a plain-prose decision procedure (120+ words) classifying each of the named x402 merchant URLs on a verdict ladder (405-on-GET-only vs 405-on-all-methods), a service slug, provider name, ISO-8601 timestamp, and generation source (llm/reasoning/deterministic).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "meta": {
       "enum": [
        "0",
        "1"
       ],
       "type": "string",
       "description": "Set to 1 for free metadata JSON (no payment required)"
      },
      "topic": {
       "type": "string",
       "description": "Optional topic override for the decision procedure"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "title": "live HTTP 405 method-cluster endpoint scorecard for agent payment endp paid response",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "ok",
      "paid",
      "service",
      "provider",
      "result"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "paid": {
       "type": "boolean"
      },
      "result": {
       "type": "object",
       "required": [
        "ok",
        "service"
       ],
       "properties": {
        "ok": {
         "type": "boolean",
         "description": "Handler success"
        },
        "brief": {
         "type": "string",
         "description": "Decision procedure prose for agents"
        },
        "model": {
         "type": "string"
        },
        "topic": {
         "type": "string"
        },
        "service": {
         "type": "string",
         "description": "Service slug"
        },
        "procedure": {
         "type": "string"
        },
        "generatedAt": {
         "type": "string",
         "description": "ISO-8601 timestamp"
        },
        "generationSource": {
         "enum": [
          "llm",
          "reasoning",
          "deterministic"
         ],
         "type": "string"
        }
       }
      },
      "payment": {
       "type": "object",
       "properties": {
        "code": {
         "type": "string"
        },
        "payer": {
         "type": "string"
        },
        "detail": {
         
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "paid": true,
  "result": {
   "ok": true,
   "brief": "plain prose decision procedure (120+ words)",
   "model": "deepseek/deepseek-v4-flash-0731",
   "topic": "string topic",
   "service": "live-http-405-method-cluster-endpoint-scorecard",
   "procedure": "same as brief",
   "generatedAt": "2026-01-01T00:00:00.000Z",
   "generationSource": "deterministic"
  },
  "service": "live-http-405-method-cluster-endpoint-scorecard",
  "provider": "K-2SO"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/live-http-405-method-cluster-endpoint-scorecard-for-agent-payment-71a1612d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from k2so.wrong.systems](https://www.zero.xyz/host/k2so.wrong.systems/llms.txt)